Something like this?

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">

    <mx:Script>
        <![CDATA[
            import mx.events.ListEvent;

            private function comboBox_change(evt:ListEvent):void {
                var value:String = comboBox.selectedItem.data;
                var cssObj:CSSStyleDeclaration;
                cssObj = StyleManager.getStyleDeclaration(".errorTip");
                cssObj.setStyle("borderColor", value);
                textInput.setStyle("errorColor", value);
            }
        ]]>
    </mx:Script>

    <mx:Array id="arr">
        <mx:Object label="Red"    data="red" />
        <mx:Object label="Orange" data="haloOrange" />
        <mx:Object label="Yellow" data="yellow" />
        <mx:Object label="Green"  data="haloGreen" />
        <mx:Object label="Blue"   data="haloBlue" />
    </mx:Array>

    <mx:ApplicationControlBar dock="true">
        <mx:Form styleName="plain">
            <mx:FormItem label="color:">
                <mx:ComboBox id="comboBox"
                        dataProvider="{arr}"
                        prompt="Please select a color:"
                        change="comboBox_change(event);" />
            </mx:FormItem>
        </mx:Form>
    </mx:ApplicationControlBar>

    <mx:TextInput id="textInput"
            errorString="Oh Noes, an errata!" />

</mx:Application>

Peter

I want to set warnings and errors.
Warnings being yellow & errors red.

Ive been trying to set

errorTip {
    borderColor: #FF0000;
}

and then programatically change it to say

warnTip {
    borderColor #FFCC00;
}

But i dont know what to set it to.
I was changing the whole TextInput style, so it would also change the errorColor respectively, and that works fine.

Yet i dont know how to change the errorTip, since i dont know to what element to apply the .styleName to

and applying it to the input as

setStyle("errorTip.borderColor", "#FFCC00")

or

setStyle("errorTip", "#FFCC00")

dont seem to work either.

Any clues?

I want to set warnings and errors.
Warnings being yellow & errors red.

Ive been trying to set

errorTip {
    borderColor: haloOrange;
}

By the way, this site is the best for learning those flex tricks that you’re allways wondering about how are done jeje.

Thanks!

What if you try setting the .errorTip style, like so:

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">

    <mx:Style>
        @font-face {
            src: local("Base 02");
            fontFamily: Base02Embedded;
        }

        .errorTip {
            borderColor: haloOrange;
            color: black;
            fontFamily: Base02Embedded;
            fontSize: 16;
            fontWeight: normal;
        }

        TextInput {
            errorColor: haloOrange;
        }
    </mx:Style>

    <mx:TextInput id="textInput"
            errorString="Hey, you missed a spot!" />

</mx:Application>

Peter